Low-pressure heating system.



E. H. GOLD.

LOW PRESSURE HEATING SYSTEM.

APPLlCATlON FILED OCT. 16. '1911.

Patented Sept. 12, 1916.

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E. H. GOLD.

LOW PRESSURE HEATING SYSTEM.

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APPLICATION FILED OCT. I6. 19H.

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EGBERT H. GOLD, OF CHICAGO, ILLINOIS.

LOW-PRESSURE HEATING SYSTEM.

Specification of Letters Patent.

Patented Sept. 12, 1916.

Application filed October 16, 1911. Serial No. 654,987.

To all ifi/0m t may concern.'

Be it known that l, EGnnnT H. GOLD, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Low-Pressure .Heating Systems, of which the following is a specification.

My invention relates to low pressure heating systems of the type in which the radiator supply pipe is provided, in addition to the usual hand operated shutoff valve, with a pressure reducing valve, the invention having particular relation to heating systems known as vapor systems in which the reducing valve is automatically controlled so as to maintain atmospheric pressure in the radiator regardless of fluctuations of pressure in the source of supply and regardless of the amount of condensation taking place in the radiator; and the invention has for its object to provide certain improvements in systems of this sort whereby the trapping of water in the inlet end of the radiator and in the radiator supply pipe, with the consequent danger of freezing, is

'effectually prevented.

The invention is of particular utility in car heating' systems in which a portion of the radiator supply pipe is under the car so as to be frequently exposed to very low temperatures. In some car heating installations of this character it is considered desirable to place the shut-off valve under'- neath the car instead of within the car. With this arrangement when the shutoff valve is closed the water of condensation from the inlet end of the radiator, finding no way of discharge, is collected in the supply or inlet pipe. If the weather is cold this water is likely to freeze so that the starting up of the system is hindered or prevented with, of course, wthe additional danger' that the frozen pipe may burst. In the heating system of my invention a device is interposed in the inlet or supply pipe between the vapor regulator and the radiator which provides a. constantly open outlet for the water of condensation at such times as steam is shut off from the system but which will not permit any outflow of steam when the heating system is in operation. It would be possible to use a steam trap at this point but for reasons which will be obvious to those skilled this art, among others the addi? tional expense involved, it is not desirable to do so.

The invention is illustrated, in a preferred embodiment, in the accompanying drawings wherein` Fig'ure 1 is a view in elevation of certain parts of the car heating system, the flooring of the car and certain operative devices of the heating system being shown in section; Fig. 2, a front elevation of the drainage fitting shown in Fig. 1; Fig. 3, a section taken on line 3`3 of Fig. 2, and Fig. 1, a sectional view taken on line 4 4 of Fig, 3, looking in the direction of the arrows.

Like characters of reference designate like parts in the several figures of the drawings.

Referring first to Fig. 1, 10 designates the flooring of a railway car, 1l a radiating coil located within the car, 12 the steam train line located under the car, and 13, 13a, 13h, and 13U the supply pipe leading from the train line to the inlet end of radiator 11. In the supply pipe is interposed a shut-off valve 14, of familiar construction, the stem of which 15 extends up through the floor of the car and is provided with a hand wheel 16. A vapor regulator 19 is also interposed in the supply pipe. this device is familiar so that it is sufficient to say that its valve 18 controlled by its thermostatic member 17 which responds to the outflow of steam or Vapor from the radiator discharge pipe 20, maintains atmospheric pressure in the low pressure end of the supply pipe and in the radiator l1.

The characteristic feature of the present invention is the interposition in the supply pipe, between the vapor regulator and radiator 11, of a fitting, designated generally by the numeral 21, which is provided with a water outlet of such character as not to permit any appreciable outflow of steam. The construction of this fitting is shown in detail in Figs. 2 to 4 inclusive. 22 designa-tes a plate formed atv its upper end with the hollow cylindrical part 28 providing the chamber or steam passageway 2i. The cylindrical member 28 has the threaded openings 25, 26 at opposite ends. In the opening 25 is secured the nozzle 27 which preferably projects into the steam passageway 24. The pipe section 13b is secured in the nozzle 27. In the opening 26 is a nipple 28 in which is secured the pipe section 13C, The face of rlhe construction of plate 22 is formed with two circuitous, preferably zigzag, grooves 29 which intersect at intervals. The plate is also formed with a port 30 leading from the steam passageway 24 to the upper end of the zigzag grooves 29 and with a port 31 Awhich leads from the lower ends of the grooves to the bottom edge of the plate. Secured to the face of plate 22 by bolts 32 is a cover plate 33.

I have found that a itting like that above described will eifectually retain the steam, while of course permitting outflow of water of condensation, even when the pressure is somewhat in excess of atmospheric pressure. The steam, it would seein, is bailied by the configuration and arrangement of the passages 29. The device, in tact, is operative even without employing the nozzle 27 when the steam is at atmospheric pressure or a trifle above. The introduction of the steam into the steam passage or chamber 24C through the nozzle 27, the cross sectional area of the bore of which is smaller than that oit' the supply pipe, tends to exhaust the air in the chamber 24, on the principle of a jet eXhauster, and this results in air being sucked up through the water outlet 29, 30, 31, which eounteracts the tendency ofthe steamY to escape through the outlet. It is possible also that this operation is facilitated by the velocity imparted to the stream in the' direction of the pipe section 13C. The arrangement and configuration of the channels 29 apparently effect the retention of the steam by dividing the outiiowing stream into two streams which battle each other at the points of intersection.

I claim: l

1. In a car heating system the combination with a radiator, of a train pipe, a supply pipe for the radiator, and a valveless drainage device provided with a steam passageway therethrough interposed in the supply pipe between the said valve and the radiator provided with a water outlet open to the atmosphere formed of two circuitous channels which intersect at intervals.

2. In a car heating system the combination with a radiator located in the car, of a train pipe, a supply pipe for the radiator and a valve interposed in the supply pipe all located outside of the car; and a drainage device interposed in the supply pipe between the said valve and the radiator pro- Copes of this patent may be obtained for vided with a steam passageway there through, a water outlet leading trom said steam passageway and open to theatmosphere, and a steam nozzle extending into the passageway on the inlet side of the device.

3. In a car heating system the combination with a radiator located in the car, of a train pipe, a supply pipe for the radiator, a valve all located outside of the car; and a drainage device interposed in the supply pipe between the said valve and the radiator provided with a steam passageway therethrough, a water outlet formed by two zigzag channels intersecting at intervals and open to the atmosphere, and a steam nozzle extending into the steam passage 'ay on the inlet side of the device.

4. In a car heating system the combination with a radiator, et a train pipe, a. supply pipe tor the radiator, a valve, and a valveless drainage device interposed in the supply pipe between the said valve and the radiator provided with a steam passage.- way therethrough, a water outlet leading from said steam passage "ay comprising a zigzag channel of relatively small cross sectional arca in comparison with the cross sectional area of the supply pipe.

5. In a car heating system, the combination with a radiator, ot' a train pipe, a supply tor the radiator, a valve, and a valveless drainage device in said supply pipe provided with a steam passageway therethrough, a water outlet leading from said passageway comprising two zigzag channels which intersect at intervals, and a vapor regulating device interposed in said supply pipe between the drainage device and the said valve.

6. In a car heating system, the combination with a radiator having intake and outlet pipes, and a steam supply pipe communicating with said intake pipe, oit an injector interposed in said .intake pipe, the interior oi said injector' communicating with the outer air through a valveless drainage passageway comprising two zi g-za'g channels which intersect at intervals of a cross-seo tional area relatively restricted as compared with that of said intake pipe.

EGBERT Il'. GOLD.

.Vitnesses z P. IV. TRUMAN, L. A. FALKENnnRo.

ve cents each, by addressing the Commissioner of latents, Washington, D. C.

Correction in Letters Patent No.1,198,019.

12, 1916, upon the application of Egbert H. Golii, of Chicago, Illinois, for an improvernent in LOW-Pressure Systerns7 an error appears in the printed speoifioation requiring correction as follows: Page 2, line 41, elairn 1, after the Word "radiator insert the Words a valve; and that the said Letters Patent should be read With this correotion therein that the same may conform to the record of the ease in the Patent Oflioe.

Signed and sealed this 24th day of October, A. D., 1916.

[SEAL] F. W. H. CLAY,

Acting Commissioner of Patents. p

lt is hereby certified that in Letters Patent No.1,198,919, granted September if 

